add normals toggle

engine/include/group.hpp

@@ -34,7 +34,7 @@ class Group {
 
   void rotate(float angle, float x, float y, float z);
 
-  void drawGroup(bool lights, const Frustsum& frustsum);
+  void drawGroup(bool lights, const Frustsum& frustsum, bool normals);
 
 };
 

engine/include/model.hpp

@@ -44,6 +44,7 @@ class Model {
   void drawModel();
   void setupModel();
   bool loadTexture();
+  void drawNormals();
 
   std::vector<Vertex> getPoints();
 

engine/src/group.cpp

@@ -57,7 +57,7 @@ glm::mat4 applyTransformations(std::vector<Transformations> order,
   return matrix;
 }
 
-void Group::drawGroup(bool lights, const Frustsum& frustsum) {
+void Group::drawGroup(bool lights, const Frustsum& frustsum, bool normals) {
   glPushMatrix();
 
   glm::mat4 matrix = applyTransformations(this->order, this->static_transformations, this->rotations, this->translates);
@@ -70,11 +70,12 @@ void Group::drawGroup(bool lights, const Frustsum& frustsum) {
 
     if(model.bounding_sphere.isInsideFrustsum(frustsum, matrix)) {
       model.drawModel();
+      if(normals) model.drawNormals();
     }
   }
 
   for (Group& sub : this->subgroups) {
-    sub.drawGroup(lights, frustsum);
+    sub.drawGroup(lights, frustsum, normals);
   }
 
   glPopMatrix();

engine/src/main.cpp

@@ -26,6 +26,7 @@ float zoom = 1.0f;
 int axis = 1;
 int wireframe = 1;
 bool imgui = true;
+bool normals = false;
 
 bool isDragging = false;
 int lastMouseX, lastMouseY;
@@ -118,7 +119,7 @@ void renderScene(void) {
     drawLights(c.lights);
   }
 
-  c.group.drawGroup(lights, frustsum);
+  c.group.drawGroup(lights, frustsum, normals);
 
   frameCounter();
 
@@ -215,6 +216,9 @@ void processNormalKeys(unsigned char key, int x, int y) {
     case 'i':
       imgui = !imgui;
       break;
+    case 'n':
+      normals = !normals;
+      break;
     default:
       break;
   }

engine/src/model.cpp

@@ -203,4 +203,14 @@ void Model::drawModel() {
   glBindTexture(GL_TEXTURE_2D, 0);
 }
 
+void Model::drawNormals() {
+  glBegin(GL_LINES);
+  for (const Vertex& point : this->vbo) {
+    glVertex3f(point.position.x, point.position.y, point.position.z);
+    glVertex3f(point.position.x + point.normal.x, point.position.y + point.normal.y,
+               point.position.z + point.normal.z);
+  }
+  glEnd();
+
+}
 std::vector<Vertex> Model::getPoints() { return this->_points; }